Ilia Denisov
79 lines
1.8 KiB
Go
79 lines
1.8 KiB
Go
package racenamestub_test
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import (
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"context"
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"errors"
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"strconv"
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"sync"
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"sync/atomic"
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"testing"
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"time"
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"galaxy/lobby/internal/adapters/racenamestub"
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"galaxy/lobby/internal/ports"
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"galaxy/lobby/internal/ports/racenamedirtest"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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func TestDirectoryContract(t *testing.T) {
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racenamedirtest.Run(t, func(now func() time.Time) ports.RaceNameDirectory {
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var opts []racenamestub.Option
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if now != nil {
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opts = append(opts, racenamestub.WithClock(now))
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}
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directory, err := racenamestub.NewDirectory(opts...)
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require.NoError(t, err)
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return directory
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})
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}
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func TestReserveConcurrentUniquenessInvariant(t *testing.T) {
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t.Parallel()
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const goroutines = 64
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const raceName = "SolarPilot"
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const gameID = "game-concurrency"
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ctx := context.Background()
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directory, err := racenamestub.NewDirectory()
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require.NoError(t, err)
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var (
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successCount atomic.Int32
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takenCount atomic.Int32
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waitGroup sync.WaitGroup
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start = make(chan struct{})
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)
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waitGroup.Add(goroutines)
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for index := range goroutines {
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userID := "user-" + strconv.Itoa(index)
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go func(userID string) {
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defer waitGroup.Done()
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<-start
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err := directory.Reserve(ctx, gameID, userID, raceName)
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switch {
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case err == nil:
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successCount.Add(1)
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case errors.Is(err, ports.ErrNameTaken):
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takenCount.Add(1)
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default:
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t.Errorf("unexpected error: %v", err)
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}
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}(userID)
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}
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close(start)
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waitGroup.Wait()
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assert.Equal(t, int32(1), successCount.Load())
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assert.Equal(t, int32(goroutines-1), takenCount.Load())
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availability, err := directory.Check(ctx, raceName, "user-missing")
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require.NoError(t, err)
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assert.True(t, availability.Taken)
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assert.Equal(t, ports.KindReservation, availability.Kind)
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}
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